Volume 129, Number 6, March 2020
|Number of page(s)||5|
|Published online||27 April 2020|
Diffusion and entanglement in open quantum systems
Collège de France - 11 place Marcelin Berthelot, 75231 Paris Cedex 05, France and Laboratoire de Physique Théorique de l'École Normale Supérieure de Paris, CNRS, ENS & PSL Research University, UPMC & Sorbonne Universités - 75005 Paris, France
Received: 18 March 2020
Accepted: 9 April 2020
The macroscopic fluctuation theory provides a complete hydrodynamic description of nonequilibrium classical diffusive systems. As a first step towards a diffusive theory of open quantum systems, we propose a microscopic open quantum system model —the selective dephasing model. It exhibits genuine quantum diffusive scaling. Namely, the dynamics is diffusive and the density matrix remains entangled at large length scales and long time scales.
PACS: 05.30.-d – Quantum statistical mechanics / 03.65.Yz – Decoherence; open systems; quantum statistical methods / 02.50.Ey – Stochastic processes
© EPLA, 2020
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